EXHIBIT 21

                         Subsidiaries of the Registrant

     The following are  subsidiaries  of the  Registrant as of December 31, 2002
and the  jurisdiction  in  which  each is  organized.  Each of the  subsidiaries
conducts its business using the names  indicated  except as separately set forth
herein.  Certain  subsidiaries are not listed. These omitted subsidiaries either
individually or in the aggregate would not constitute a significant subsidiary.

                                                           State or
                                                           Country of
Subsidiary                                                 Organization
-----------                                                ------------

     Subsidiary of the Registrant:
         CDI Corporation (a)                               Pennsylvania

Subsidiaries of CDI Corporation:
     CDI AndersElite Limited   (b)                         United Kingdom
     CDI Engineering Group, Inc.  (c)                      Delaware
     CDI Holdings (UK) Limited                             United Kingdom
     CDI Marine Company   (d)                              Florida
     C.D.I. Professional Services Group,
     S. de R.L. de C.V. (e)                                Mexico
     CDI Technical Services, Ltd.   (f)                    Canada
     Liquid Medium, LLC                                    Delaware
     The M&T Company                                       Pennsylvania
     Management Recruiters International, Inc. (g)         Delaware
     Maplehill Corporation                                 Delaware
     M.E. -Michigan, Inc                                   Michigan
     Shares Services of West Virginia, Inc.                Delaware
     Todays Staffing, Inc.   (h)                           Pennsylvania


Subsidiary of CDI AndersElite Limited:
     CDI AndersElite Ireland Limited                       Ireland
     EuroElite Plc                                         United Kingdom

Subsidiaries of CDI Engineering Solutions, Inc.:
     Herzog-Hart Limited                                   United Kingdom

Subsidiary of CDI Holdings (UK) Limited:
     Harvard Associates Limited                            United Kingdom

Subsidiaries of Management Recruiters International, Inc.:
     Brownshill Corporation                                Delaware
     InterExec, Inc.     (i)                               Ohio
     Management Recruiters of Cuernevaca, Inc.             Ohio

Subsidiary of Brownshill Corporation:
     Brownshill Holdings Limited                           United Kingdom

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                                                           State or
                                                           Country of
Subsidiary                                                 Organization
-----------                                                ------------

Subsidiary of Brownshill Holdings Limited:
     MRI Worldwide Ltd                                     United Kingdom

Subsidiary of Maplehill Corporation:
     Asset Computer Personnel Corporation                  Nova Scotia

Subsidiaries of Todays Staffing, Inc.:
     Todays Staffing, Ltd.                                 Canada
     Spectra Professional Search of Massachusetts, Inc.    Massachusetts


(a)  CDI  Corporation  also  conducts its business  using the trade names of CDI
     Professional  Services,  CDI  Innovantage,  CDI Engineering  Services,  CDI
     Engineering Solutions and CDI Managed CADD Services.

(b)  CDI AndersElite  Limited also conducts its business using the trade name of
     CDI Professional Services.

(c)  CDI  Engineering  Group,  Inc. also conducts its business using the name of
     CDI Engineering Solutions.

(d)  CDI Marine also  conducts  its  business  using the name of CDI  Government
     Services.

(e)  C.D.I.  Professional  Services  Group, S. de R.L. de C.V. also conducts its
     business using the trade name of CDI.

(f)  CDI Technical Services Ltd. also conducts its business using the trade name
     of CDI Professional Services.

(g)  Management Recruiters International,  Inc. also conducts its business using
     the  trade  names  of  Sales  Consultants,  Office  Mates  5,  CompuSearch,
     ConferView and Banister International.

(h)  Todays  Staffing,  Inc.  also  conducts its business  using the trade names
     Todays Legal Staffing and Todays Office Staffing.

(i)  InterExec, Inc. also conducts its business using the trade name of DayStar.